<script language="javascript"><style>
    
.btn-modal {
    padding: 12px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 20px;
}
.btn-modal:hover {
    background-color: #45a049;
}
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow: auto;
}
.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 20px;
    border: 1px solid #888;
    border-radius: 10px;
    width: 80%;
    max-width: 500px;
    text-align: center;
}
.modal-content h2 {
    margin-bottom: 20px;
    font-size: 24px;
    color: #333;
}
.modal-content ul {
    list-style: none;
    padding: 0;
    font-size: 18px;
}
.modal-content ul li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}
.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}
    
#vista-previa {
    display: none;
    background-color: #ade6c6;
    color: #2778c4;
    padding: 15px;
    border-radius: 8px;
    margin-top: 20px;
    font-size: 14px;
    line-height: 1.6;
    text-align: center;
    border: 1px solid #4caf50;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}
body {
    background-color: #f4f7f6;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 10px; 
}
.card {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    padding: 20px; 
    width: 100%;
    max-width: 500px;
    margin: 20px auto; 
    transition: transform 0.2s ease-in-out;
}
.card:hover {
    transform: translateY(-5px);
}
h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
    font-size: 22px;
    font-weight: 600;
}
label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #555;
}
input[type="text"],
input[type="file"],
select {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 8px;
    border: 1px solid #ddd;
    background-color: #fafafa;
    font-size: 14px;
    color: #333;
    transition: border-color 0.2s;
}
input[type="text"]:focus,
input[type="file"]:focus,
select:focus {
    border-color: #4CAF50;
    outline: none;
}
input[type="submit"] {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background-color: #4CAF50;
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
input[type="submit"]:hover {
    background-color: #45a049;
}
center {
    text-align: center;
}
@media (max-width: 768px) {
    .card {
        padding: 20px;
    }
}
</style></script>